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chromium toxicity

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https://www.readbyqxmd.com/read/27931767/blood-and-urinary-levels-of-metals-and-metalloids-in-the-general-adult-population-of-northern-france-the-imepoge-study-2008-2010
#1
Catherine Nisse, Romuald Tagne-Fotso, Mike Howsam, Camille Richeval, Laurence Labat, Ariane Leroyer
BACKGROUND: The assessment of human chemical risks related to occupational or environmental exposure to pollutants requires the use of both accurate exposure indicators and reference values. The objective of this study was to evaluate the blood and urinary levels of various metals and metalloids in a sample of adults aged 20-59 years of the general population of Northern France, a formerly heavily industrialised area that retains some industrial activity. METHODS: A cross-sectional study was conducted between 2008 and 2010, enrolling 2000 residents of Northern France...
October 3, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/27922088/analysis-of-four-toxic-metals-in-a-single-rice-seed-by-matrix-solid-phase-dispersion-inductively-coupled-plasma-mass-spectrometry
#2
Xiufen He, Lixia Chen, Xin Chen, Huamei Yu, Lixu Peng, Bingjun Han
Toxic metals in rice pose great risks to human health. Metal bioaccumulation in rice grains is a criterion of breeding. Rice breeding requires a sensitive method to determine metal content in single rice grains to assist the variety selection. In the present study, four toxic metals of arsenic (As), cadmium (Cd), chromium (Cr) and lead (Pb) in a single rice grain were determined by a simple and rapid method. The developed method is based on matrix solid phase dispersion using multi-wall carbon nanotubes (MWCNTs) as dispersing agent and analyzed by inductively coupled plasma mass spectrometry...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27911906/adsorptive-removal-of-toxic-chromium-from-waste-water-using-wheat-straw-and-eupatorium-adenophorum
#3
Dagang Song, Kaiwen Pan, Akash Tariq, Azizullah Azizullah, Feng Sun, Zilong Li, Qinli Xiong
Environmental pollution with heavy metals is a serious issue worldwide posing threats to humans, animals and plants and to the stability of overall ecosystem. Chromium (Cr) is one of most hazardous heavy metals with a high carcinogenic and recalcitrant nature. Aim of the present study was to select low-cost biosorbent using wheat straw and Eupatorium adenophorum through simple carbonization process, capable of removing Cr (VI) efficiently from wastewater. From studied plants a low cost adsorbent was prepared for removing Cr (VI) from aqueous solution following very simple carbonization method excluding activation process...
2016: PloS One
https://www.readbyqxmd.com/read/27907204/homologous-recombination-and-translesion-dna-synthesis-play-critical-roles-on-tolerating-dna-damage-caused-by-trace-levels-of-hexavalent-chromium
#4
Xu Tian, Keyur Patel, John R Ridpath, Youjun Chen, Yi-Hui Zhou, Dayna Neo, Jean Clement, Minoru Takata, Shunichi Takeda, Julian Sale, Fred A Wright, James A Swenberg, Jun Nakamura
Contamination of potentially carcinogenic hexavalent chromium (Cr(VI)) in the drinking water is a major public health concern worldwide. However, little information is available regarding the biological effects of a nanomoler amount of Cr(VI). Here, we investigated the genotoxic effects of Cr(VI) at nanomoler levels and their repair pathways. We found that DNA damage response analyzed based on differential toxicity of isogenic cells deficient in various DNA repair proteins is observed after a three-day incubation with K2CrO4 in REV1-deficient DT40 cells at 19...
2016: PloS One
https://www.readbyqxmd.com/read/27901646/the-time-dependent-health-and-biochemical-effects-in-rats-exposed-to-stainless-steel-welding-dust-and-its-soluble-form
#5
Tadeusz Halatek, Magdalena Stanislawska, Irena Kaminska, Malgorzata Cieslak, Radoslaw Swiercz, Wojciech Wasowicz
Welding processes that generate fumes containing toxic metals, such as hexavalent chromium (Cr(VI)), manganese (Mn), and nickel (Ni), have been implicated in lung injury, inflammation, and lung tumor promotion in animal models. The principal objective of this study was to determine the dynamics of toxic effects of inhalation exposure to morphologically rated welding dust from stainless steel welding and its soluble form in TSE System with a dynamic airflow. We assessed the pulmonary toxicity of welding dust in Wistar rats exposed to 60...
November 30, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27891370/trace-elements-in-chronic-haemodialysis-patients-and-healthy-individuals-a-comparative-study
#6
Lokesh Shanmugam, Siva Ranganathan Green, Hemachandar Radhakrishnan, Tony Mathew Kadavanu, Arunkumar Ramachandrappa, Shashank Rakesh Tiwari, Amirtha Lakshmi Rajkumar, Ezhumalai Govindasamy
INTRODUCTION: End Stage Renal Disease (ESRD) patients despite receiving adequate Haemodialysis (HD) develop significant risk of Cardiovascular Disease (CVD). Abnormality in levels of trace elements may potentiate vascular injury by producing sustained inflammation and endothelial dysfunction. Hence, the present study was undertaken to evaluate the levels of trace elements in patients receiving HD. AIM: To study the blood levels of arsenic, cadmium, mercury, lead, chromium, barium, cobalt, caesium and selenium among ESRD patients undergoing HD and compare it with healthy individuals...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27870934/remediation-of-hexavalent-chromium-spiked-soil-by-using-synthesized-iron-sulfide-particles
#7
Yujie Li, Wanyu Wang, Liqiang Zhou, Yuanyuan Liu, Zakaria A Mirza, Xiang Lin
Carboxymethyl cellulose (CMC) stabilized microscale iron sulfide (FeS) particles were synthesized and applied to remediate hexavalent chromium (Cr(VI)) spiked soil. The effects of parameters including dosage of FeS particles, soil moisture, and natural organic matter (NOM) in soil were investigated with comparison to iron sulfate (FeSO4). The results show that the stabilized FeS particles can reduce Cr(VI) and immobilize Cr in soil quickly and efficiently. The soil moisture ranging from 40% to 70% and NOM in soil had no significant effects on Cr(VI) remediation by FeS particles...
November 18, 2016: Chemosphere
https://www.readbyqxmd.com/read/27859739/transcriptomic-responses-in-the-oral-cavity-of-f344-rats-and-b6c3f1-mice-following-exposure-to-cr-vi-implications-for-risk-assessment
#8
Chad M Thompson, Julia E Rager, Mina Suh, Caroline L Ring, Deborah M Proctor, Laurie C Haws, Rebecca C Fry, Mark A Harris
Exposure to hexavalent chromium [Cr(VI)] in drinking water was previously reported to increase oral tumor incidence in F344 rats. To investigate the mode of action for these tumors, transcriptomic profiles in oral mucosa samples of F344 rats and B6C3F1 mice were analyzed following exposure to 0.1-180 ppm Cr(VI) for 7 or 90 days. In rats, genome-wide microarray analyses identified no significantly differentially expressed genes (DEGs) at either time point. In mice, 14 and 1 DEGs were respectively identified after 7 and 90 days of exposure...
December 2016: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/27858787/hexavalent-chromium-removal-by-using-synthesis-of-polyaniline-and-polyvinyl-alcohol
#9
Majid Riahi Samani, Parisa Ebrahimbabaie, Hamed Vafaei Molamahmood
Over the past few years, heavy metals have been proved to be one of the most important contaminants in industrial wastewater. Chromium is one of these heavy metals, which is being utilized in several industries such as textile, finishing and leather industries. Since hexavalent chromium is highly toxic to human health, removal of it from the wastewater is essential for human safety. One of the techniques for removing chromium (VI) is the use of different adsorbents such as polyaniline. In this study, composites of polyaniline (PANi) were synthesized with various amounts of polyvinyl alcohol (PVA)...
November 2016: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/27858271/pilot-study-on-the-internal-exposure-to-heavy-metals-of-informal-level-electronic-waste-workers-in-agbogbloshie-accra-ghana
#10
Jürgen Wittsiepe, Torsten Feldt, Holger Till, Gerd Burchard, Michael Wilhelm, Julius N Fobil
Informal-level electronic waste (e-waste)-processing activities are performed at hotspots in developing countries such as India, China, and Ghana. These activities increase the ambient burden of heavy metals and contribute to the toxic exposure of the general population. However, few data exist on the internal exposure of populations involved in these informal activities and in close contact with fumes from the direct combustion of electronic waste products in these countries. Therefore, in a cross-sectional study design, we analyzed blood, urine, and hair samples from 75 e-waste workers residing in and/or working on a large e-waste recycling site in Agbogbloshie, Accra, Ghana, and compared the results against those of 40 individuals living in a suburb of Accra without direct exposure to e-waste recycling activities...
November 17, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27836472/facile-preparation-of-magnetic-mesoporous-mnfe2o4-sio2-ctab-composites-for-cr-vi-adsorption-and-reduction
#11
Na Li, Fenglian Fu, Jianwei Lu, Zecong Ding, Bing Tang, Jiabin Pang
Chromium-contaminated water is regarded as one of the biggest threats to human health. In this study, a novel magnetic mesoporous MnFe2O4@SiO2-CTAB composite was prepared by a facile one-step modification method and applied to remove Cr(VI). X-ray diffraction, scanning electron microscopy, transmission electron microscopy, specific surface area, and vibrating sample magnetometer were used to characterize MnFe2O4@SiO2-CTAB composites. The morphology analysis showed that the composites displayed a core-shell structure...
January 2017: Environmental Pollution
https://www.readbyqxmd.com/read/27821044/comparative-transcriptome-profiling-of-two-brassica-napus-cultivars-under-chromium-toxicity-and-its-alleviation-by-reduced-glutathione
#12
Rafaqat A Gill, Basharat Ali, Peng Cui, Enhui Shen, Muhammad A Farooq, Faisal Islam, Shafaqat Ali, Bizeng Mao, Weijun Zhou
BACKGROUND: Chromium (Cr) being multifarious industrial used element, is considered a potential environmental threat. Cr found to be a prospective water and soil pollutant, and thus it is a current area of concern. Oilseed rape (Brassica napus L.) is well known as a major source of edible oil around the globe. Due to its higher growth, larger biomass and capability to uptake toxic materials B. napus is considered a potential candidate plant against unfavorable conditions. To date, no study has been done that described the Cr and GSH mechanism at RNA-Seq level...
November 7, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27817875/photoelectrochemical-cell-for-simultaneous-electricity-generation-and-heavy-metals-recovery-from-wastewater
#13
Dawei Wang, Yi Li, Gianluca Li Puma, Panagiotis Lianos, Chao Wang, Peifang Wang
The feasibility of simultaneous recovery of heavy metals from wastewater (e.g., acid mining and electroplating) and production of electricity is demonstrated in a novel photoelectrochemical cell (PEC). The photoanode of the cell bears a nanoparticulate titania (TiO2) film capped with the block copolymer [poly(ethylene glycol)-b-poly(propylene glycol)-b-poly(ethylene glycol)] hole scavenger, which consumed photogenerated holes, while the photogenerated electrons transferred to a copper cathode reducing dissolved metal ions and produced electricity...
February 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27810679/e-cigarettes-as-a-source-of-toxic-and-potentially-carcinogenic-metals
#14
Catherine Ann Hess, Pablo Olmedo, Ana Navas-Acien, Walter Goessler, Joanna E Cohen, Ana Maria Rule
BACKGROUND AND AIMS: The popularity of electronic cigarette devices is growing worldwide. The health impact of e-cigarette use, however, remains unclear. E-cigarettes are marketed as a safer alternative to cigarettes. The aim of this research was the characterization and quantification of toxic metal concentrations in five, nationally popular brands of cig-a-like e-cigarettes. METHODS: We analyzed the cartomizer liquid in 10 cartomizer refills for each of five brands by Inductively Coupled Plasma Mass Spectrometry (ICP-MS)...
January 2017: Environmental Research
https://www.readbyqxmd.com/read/27793765/gene-expression-profiling-and-bioinformatics-analysis-in-16hbe-cells-treated-by-chromium-vi
#15
Guiping Hu, Jiaxing Liu, Yongming Zhang, Pai Zheng, Lele Wang, Lin Zhao, Huadong Xu, Zhangjian Chen, Tiancheng Wang, Guang Jia
Hexavalent chromium [Cr(VI)] compounds are widely used in industry and agriculture and are also ubiquitous environmental contaminant which are recognized as one kind of carcinogen, mutagen and teratogen towards humans and animals. To determined the Cr(VI) toxicity effects, gene expression profile can be meaningful for discovering underlying mechanisms of toxicity, and identifying potential specific genetic markers of Cr(VI) exposure and effects. In the current study, gene expression profiling and bioinformatics analysis in 16HBE cells treated by chromium(VI) compound were performed...
October 26, 2016: Toxicology Letters
https://www.readbyqxmd.com/read/27779222/lead-chromate-detected-as-a-source-of-atmospheric-pb-and-cr-vi-pollution
#16
Pyeong-Koo Lee, Soonyoung Yu, Hye Jung Chang, Hye Young Cho, Min-Ju Kang, Byung-Gon Chae
Spherical black carbon aggregates were frequently observed in dust dry deposition in Daejeon, Korea. They were tens of micrometers in diameter and presented a mixture of black carbon and several mineral phases. Transmission electron microscopy (TEM) observations with energy-dispersive X-ray spectroscopy (EDS) and selected area diffraction pattern (SADP) analyses confirmed that the aggregates were compact and included significant amounts of lead chromate (PbCrO4). The compositions and morphologies of the nanosized lead chromate particles suggest that they probably originated from traffic paint used in roads and were combined as discrete minerals with black carbon...
October 25, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27778338/preliminary-investigation-of-mineral-content-of-pollen-collected-from-different-serbian-maize-hybrids-is-there-any-potential-nutritional-value
#17
Aleksandar Ž Kostić, Lazar M Kaluđerović, Biljana P Dojčinović, Miroljub B Barać, Vojka B Babić, Marina P Mačukanović-Jocić
BACKGROUND: Bee pollen has already proved to be a good supplement rich in content of iron and zinc. Studies about application of flower pollen in food industry and medicine have been started. Bearing in mind prevalence of maize as crop culture its pollen will be easily available. The mineral composition of pollen of seven Serbian maize hybrids was analyzed in order to establish its nutritional value and benefits of its implementation in the human diet using ICP method. RESULTS: Presence of twenty four different macro- (nine) and micronutrients (fifteen) was detected...
October 24, 2016: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/27763350/wastewater-containing-cr-vi-treatment-using-solar-tubular-reactor
#18
Tiele Caprioli Machado, Marla Azário Lansarin
The hexavalent chromium, Cr(VI), which is generated in the electroplating process, is toxic to most organisms and potentially harmful to human health. The method generally used for remediation of wastewater containing Cr(VI) employs chemicals with high toxicity. This work proposes an alternative technology for the treatment of these wastewaters, based on photochemical reduction of Cr(VI) by alcohols under radiation, which is environmentally sustainable and economically viable. Initially, a batch reactor in laboratory scale was used to determine the best experimental conditions and its specific reaction rate was calculated...
October 2016: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/27745961/impact-of-fe-iii-as-an-effective-electron-shuttle-mediator-for-enhanced-cr-vi-reduction-in-microbial-fuel-cells-reduction-of-diffusional-resistances-and-cathode-overpotentials
#19
Qiang Wang, Liping Huang, Yuzhen Pan, Xie Quan, Gianluca Li Puma
The role of Fe(III) was investigated as an electron-shuttle mediator to enhance the reduction rate of the toxic heavy metal hexavalent chromium (Cr(VI)) in wastewaters, using microbial fuel cells (MFCs). The direct reduction of chromate (CrO4(-)) and dichromate (Cr2O7(2-)) anions in MFCs was hampered by the electrical repulsion between the negatively charged cathode and Cr(VI) functional groups. In contrast, in the presence of Fe(III), the conversion of Cr(VI) and the cathodic coulombic efficiency in the MFCs were 65...
October 6, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27743532/mineralogical-determination-and-geo-chemical-modeling-of-chromium-release-from-aod-slag-distribution-and-leachability-aspects
#20
Junguo Li, Bao Liu, Yanan Zeng, Ziming Wang
AOD (argon oxygen decarburization) slag, which is the by-product of the stainless steel refining process, is a recyclable slag because of its high content of calcium and silicon. The leaching toxicity cannot be ignored in the recycling process because the slag contains a certain amount of Cr. In this study, the mineral analysis, batch leaching tests and thermodynamic and kinetic modeling by PHREEQC combined with FactSage software were performed to explore the influence of the dissolution of primary minerals and the precipitation of secondary minerals on the elution of Cr from AOD slag...
October 11, 2016: Chemosphere
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